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Question by thedodgeruk · Oct 31, 2012 at 11:58 PM · gameobjectlistordersort

sort a List of GameObjects by distance?

i have a List m_list

its full of gameobjects

i have my player position and i want to order the m_list by the distance from my player. how do i go about this ?

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Answer by Fattie · Feb 09, 2016 at 04:27 PM

If using System.Linq;

 hits = hits.OrderBy(
    x => Vector2.Distance(this.transform.position,x.transform.position)
   ).ToList();

Linqless

 hits.Sort(delegate(Enemy a, Enemy b)
  {return Vector2.Distance(this.transform.position,a.transform.position)
   .CompareTo(
     Vector2.Distance(this.transform.position,b.transform.position) );
 });

Hope it saves some typing.

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avatar image The_Zero_Zero · Jan 20, 2019 at 02:51 AM 1
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Great answer, worked like a charm. I think just to clarify for other beginners like myself the above solution is taking an array and comparing the distance to a point with each object in the array.

avatar image Pangamini · Jun 13, 2019 at 08:33 AM 5
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Don't sort by distance, it includes calculating a square root which is expensive. Ins$$anonymous$$d, sort by squared distance (VectorA-VectorB).sqr$$anonymous$$agnitude. It is much faster to compute (much much faster) and the result is mathematically proven to be the same (since sqrt is a rising one-to-one function for positive numbers, which a distance always is)

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